The silverback gorilla is a special animal. This magnificent male is part of an endangered species. Complete this sheet to learn all about this gentle giant.

Learn more about two kinds of aquatic biomesÃfreshwater and saltwater biomesÃand how you can tell them apart.

Learn about the animal kingdom with this centipede anatomy worksheet. Fun fact: Centipedes have either 15 or 17 pairs of legs, but never 16!

Which tail goes with which animal? Help your preschooler learn to sort and categorize with this fun activity.

This spikey Stegosaurus looks fierce, but don't worry -- he's a vegetarian! Learn all about this massive dinosaur with a fun fact sheet.

This mix-and-match lists examples of natural resources. Kids can connect the natural resource with the resulting product.

Next time you head outside for a hike or a camping trip, bring along this checklist of animal tracks!

Did you know there is a tortoise who is over 100 years old? Learn some interesting animal facts with this cut and paste matching activity!

Get to know some of the friendly, furry, feathery river wildlife that live near American rivers, then match each one to its home.

The Mockingbird is Tennesse's state bird: it can mimic the sounds of other birds, and even the sounds of insects.

Read about one of Yellowstone National Park's coolest animals, the big horn sheep.

Do shoes go on your head? Of course not! On this prekindergarten science worksheet, kids draw a line to connect each piece of clothing to the correct body part.

Clock, octopus, starfish, turtle: Which thing does not belong in this group? Kids completing this preschool worksheet identify the object that does not belong.

Launch into learning with this worksheet on Gemini 4, one of the original missions in the early days of the U.S.'s space program.

Through a simple matching activity, kids learn how their actions can have a direct effect on the environment.

Discover the symbiotic relationship that helps this angler fish find his next meal!

Get your child thinking about the five senses with this worksheet that gets her to consider taste, touch, sight, smell, and hearing.

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

This is not your average coloring page. Using only the three primary colors, mix your paints together to form as many colors as possible.

Colorado's state bird is the Lark Bunting, and you can learn all about it with this coloring page.

Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

Color, cut out, and play with these fun animal finger puppets as your nature lover learns more about prairie dogs, bison, and other animals of the grasslands.

Learn about Red River Hogs in this series of animals facts sheets and coloring pages in one.

Let your 1st grader become a mad scientist in this fun science board game, and encourage her to become a lover of the interesting subject.

Bird-watchers will love this worksheet, featuring just a sample of the many song birds flying around Yellowstone National Park.

How would you dress on a rainy day? Get your little weatherman familiar with different seasons with this fun paper doll!

Shape up your knowledge of living things with this plant sorting soirÃe! Your kid will build observational skills by describing the attributes of each plant.

Alfred Nobel, though he held over 300 patents in his lifetime, is most famous for inventing dynamite.

Practice your detective skills with this fun worksheet! Have your child go around the house and see how many things from the list they can find.

Open your ears for some interesting science! Your little biologist will learn the basic parts of the ear with this diagram.